Bundle+4+-+Compounds+and+Evidence+of+Change

Objectives 6.5c: Students can differentiate between elements and compounds on the most basic level.

6.5d: Students can identify the formation of a new substance due to a chemical change.

Guiding Questions

1. What is the difference between elements and compounds?

2. How is chemical change identified?

3. How can scientists determine whether a new substance is formed during a reaction?

=REVIEW GAME = = =

VOCABULARY ===‍‍‍ __physical change__ - a change in which the properties of a substance change but the identityof the substance always remains the same; a change in the size or state of a substance, usually from temperature, pressure or motion ===

===‍‍‍ ‍‍ __chemical change__ - a change in which the identity of a substance changes due to its chemical properties and forms a new substance or substances ===

===‍‍‍ ‍‍ __element__ - a substance composed of atoms having an identical number of protons in each nucleus ===

===‍‍‍ __ compound __ - a substances whose molecules contain atoms from different elements ===

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===‍‍‍ ‍‍ __chemical symbol__ - a one- or two-letter abbreviation for an element's name (O - oxygen) ===

===‍‍‍ ‍‍ __chemical formula__ - a set of symbols that describe the number and kind of elements in a compound (NaCl) ===

===‍‍‍ ‍‍ __matter__ - anything that has mass and takes up space ===

===‍‍‍ ‍‍ __molecule__ - a particle of matter made up of two or more atoms joined tightly together ===

===‍‍‍ ‍‍ __physical properties__ - any characteristic of a substance, such as state, color and volume, that can be observed or measured without changing or attempting to change the material ===

===‍‍‍ ‍‍ __chemical properties__ - any characteristic, such as the ability to burn, that allows a substance to change into a new substance with different properties ===

===‍‍‍ ‍‍ __oxidation__ - a common form of chemical reaction which is the combination of oxygen with various elements and compounds ===

===‍‍‍ ‍‍ __tarnish__ - a thin layer of corrosion that forms over copper, brass, silver, aluminum and other similar metals as their outermost layer undergoes a chemical reaction ===

===‍‍‍ ‍‍ __rust__ - corrosion that forms on iron and iron-coated materials as it undergoes a chemical reaction ===

===‍‍‍ ‍‍ __exothermic__ - describes a process which RELEASES thermal (heat) energy ===

===‍‍‍ ‍‍ __endothermic__ - describes a process which ABSORBS thermal (heat) energy ===

Important Links Study Jams: Elements and Compounds Bite Size Chemistry Compounds - Chem4Kids How it Works: Elements and Compounds A Closer Look at Physical and Chemical Changes Evidence of Chemical Changes [|Models of Molecules]

In Class Investigations Hot Pack Copper from Aluminum Rotten Egg Gas Instant Sunshine

Other Reactions Color Change Reaction Sugar Snake Oxidation Explosion Underwater Fireworks - Oxidation Elephant Toothpaste Orange Sorbet Sizzling Sunset Smokescreen On Demand Surprise Fire Genie in the Bottle

<span style="color: #404040; font-family: 'Arial Black',Gadget,sans-serif; font-size: 27px;">Songs and Games

<span style="color: #404040; font-family: Arial,Helvetica,sans-serif; font-size: 19px;">Element Lab <span style="color: #404040; font-family: Arial,Helvetica,sans-serif; font-size: 19px;">Chemistry Rags to Riches <span style="color: #404040; font-family: Arial,Helvetica,sans-serif; font-size: 19px;">Alien Juice Bar (pH and Chemical Change) <span style="color: #404040; font-family: Arial,Helvetica,sans-serif; font-size: 19px;">Kitchen Chemistry <span style="color: #404040; font-family: Arial,Helvetica,sans-serif; font-size: 19px;">Reversible and Irreversible Changes <span style="color: #404040; font-family: Arial,Helvetica,sans-serif; font-size: 19px;">Periodic Table Game